No Sound Is Output From Rch; No Sound Is Output From Lch - Denon DHT-S514 Service Manual

13. No sound is output from Rch

Start (MAIN PWB)
Check the input signal 4, 5, 10 and 11 pin of U19.
Is the audio signal being input?
Check the output signal 21, 23, 27 and 29 pin of U19.
Is a PWM being output?
Check the output signal between 1 and 2 pin of J5, between
3 and 4 pin of J5.
Is the audio signal being output?
Replace the speaker unit.
Finish

14. No sound is output from Lch

Start (MAIN PWB)
Check the input signal 4, 5, 10 and 11 pin of U21.
Is the audio signal being input?
Check the output signal 21, 23, 27 and 29 pin of U21.
Is a PWM being output?
Check the output signal between 1 and 2 pin of J6, between
3 and 4 pin of J6.
Is the audio signal being output?
Replace the speaker unit.
Finish
YES
YES
YES
YES
YES
YES
NO
Replace Main PWB.
NO
Check the soldering of U19.
Check the soldering of C200, C209, C210, C220, L35, L36,
NO
L37 and L38.
NO
Replace Main PWB.
NO
Check the soldering of U21.
NO Check the soldering of C250, C258, C261, C268, L39, L40,
L41 and L42.
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